package com.xiaotu.principle.ocp;

/**
 *
 * 未使用开闭原则
 *
 * @author 张晓
 * @create 2020-06-18 11:19
 */
public class Ocp {
    public static void main(String[] args) {
        //使用看看存在的问题
        GraphicEditor graphicEditor = new GraphicEditor();
        graphicEditor.drawShape(new Rectangle());
        graphicEditor.drawShape(new Circle());
        graphicEditor.drawShape(new Triangle());

    }
}


//这是一个用于绘图的类[使用方]
class GraphicEditor{
    //接收Shape对象，然后根据type,来绘制不同的图形
    public void drawShape(Shape s){
        if (s.m_type == 1)
            drawRectangle(s);
        else if (s.m_type==2)
            drawCircle(s);
        else if (s.m_type==3)
            drawTriangle(s);
    }

    //绘制矩形
    public void drawRectangle(Shape r){
        System.out.println(" 绘制矩形 ");
    }

    //绘制圆形
    public void drawCircle(Shape r){
        System.out.println(" 绘制圆形 ");
    }
    //绘制三角形
    public void drawTriangle(Shape r){
        System.out.println(" 绘制三角形 ");
    }

}
//Shape类，基类
class Shape{
    int m_type;
}

class Rectangle extends Shape{
    Rectangle(){
        super.m_type = 1;
    }
}


class Circle extends Shape{
    Circle(){
        super.m_type = 2;
    }
}

//新增画三角形
class Triangle extends Shape{
    Triangle(){
        super.m_type = 3;
    }
}